Keyfox Terms of Use

Effective October 22, 2026 · Ylemos Inc.

License

Your use of Keyfox is governed by Apple’s Licensed Application End User License Agreement (Standard EULA), together with these terms. If they conflict, the Standard EULA controls.

Free and paid content

Lessons 1–3, their songs, listening feedback and the Parent Corner are free. A Keyfox Premium subscription unlocks the remaining lessons and songs listed on the subscription screen.

Subscriptions, free trial and cancellation

Use by children

Keyfox is intended for children ages 4–8 under a parent’s or guardian’s supervision. Purchases and settings require a grown-up check. The parent or guardian accepts these terms on the child’s behalf.

Content

Songs in Keyfox are public-domain melodies arranged by us. The app, its characters, artwork and lessons are owned by Ylemos Inc. and may not be copied or redistributed.

No warranty and limitation of liability

Keyfox is a practice aid and does not replace a music teacher. Note detection depends on the instrument, room and device and may not always be accurate. To the extent permitted by law, the app is provided “as is”, and our liability is limited as described in the Standard EULA.

Changes and contact

We may update these terms; the effective date above will change and material changes will be noted in release notes. Questions: service@ylemos-inc.com.